Maslow's hierarchical model

has been validated by a number of studies

has been invalidated by intuitive means

has never been validated by studies

has been validated by empirical studies

When employing the core learning system, reading text books and attending class are important ways to knowledge.

Atreatment for stuttering in which the person is asked to speak in a singsong fashion, usually with the aid of a metronome is

Morei would really appreciate it. his eyes snapped open. a musty smell flooded his senses. the room was lowly lit, curved with smooth light gray walls. the floor was clear black tiled. he stood up, surprised to see no door, but only a trap door on the ceiling that blended in with the walls. the room was unfurnished, which struck him as strange. as you write and revise, ask yourself these questions: 1. do all of the sentences in this paragraph belong here? (unity) 2. are all of the sentences in this paragraph in the right place? (coherence-- a method of development) 3. are all of the sentences in this paragraph smoothly connected together into a whole paragraph? (coherence--use of transitional devices) once you've made certain that your paragraphs are both unified and coherent, edit your work for problems in grammar and mechanics before submitting it to your teacher.